Spark-arrester



(No Model.)

G. SALTSMAN.

SPARK ARRESTER.

N. Patins. Phmmnvgmpher. wa-nlngxm.. u. c.

rTED Srarns artnr einen..

GEORGE SALTSMAN, OF BLOOMINGTON, ILLINOIS,

SPARK-ARRESTER.

SBTEGIFICATION forming part of Letters Patent No. 331,089, datedNovember 24, 1885.

Application filed January 24, 1884. Serial No. 118,556. (No model.)

T0 all whom it may concern:

Be it known that I, GEORGE SALTsMAN, of Bloomington, in the county ofMcLean, and in the State of Illinois, have invented certain new anduseful Improvements in Spark-Arresters and Smoke-Consumers; and I dohereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,and to the letters of reference marked thereon, making a part of thisspecification, and in which- Figure 1 is a vertical section through asmoke-stack. Fig.2 is a vertical section at right angles to Fig. l, Fig.3, a horizontal lsection through the line a; x of Fig. l.

This invention relates to certain new and useful improvements inspark-arresters, having for its object the arresting of the sparks byfans operated by the rising products of combustion, heated air, andexhaust -steam passing upward through the smoke-stack, in which fans arearranged, and also utilizing a large per cent. of what are now the Wasteproducts of combustion; and to this end the invention consists in novelfeatures of construction and combination and arrangement of parts, allas will be hereinafter fully described, and set forth in the claimshereto annexed.

In the drawings, A represents an outer cylinder or stack, which, beingmerely for looks or appearance, may be dispensed with, if desired, and Bthe inner cylinder or smokestack, through which the products ofcombustion-smoke, gases, and sparks-pass upward, and within saidcylinder or smokestack B, project the spark-arresting fans C G, andpartially revolve one above the other, and in such close proximity asthe fan-blades may slightly lap each other, and thereby arrest thesparks, Sto., in their upward course and deliver them intothe-discharge-spouts connected with the usual fire-box of a boiler. Thefans C O are operated by the rising products of combustion, heated air,and exhaust-steam, which are admitted through the exhaust-pipe h, nearthe base of the inner cylinder orsmokestack, B, and which exhaust-pipemay extend upward in said stack, as shown, and the admission of theexhaust-steam into said pipe controlled by a valve or stop-cock, as maybe found expedient. The fans C C are connected by beveled or frictionalgearing c c with the fans D D, (said gearing being mounted on theirrespective shafts,) and operate the latter fans, D D, which fans forceair down through the tubes G G into conduits F F, thereby creating anexhaust, 4which draws and forces the sparks, smoke, and other productsof combustion received into said conduits F F from the spark-arrestingfans C C into the fire-box of the boiler. The fans C G are apt torevolve too rapidly, and getting under too great momentum the sparks areliable to go by said fans, and thus escape upward through the cylinderor stack B. This is to a great extent overcome by the fans D D retardingthe momentum of the fans C C. It will therefore be seen that the fans DD have a twofold function: to check somewhat the otherwise, perhaps, toorapid motion of the fans O O, and, secondly, to furnish an exhaust forsparks, smoke, Sac., passing into the conduits F F, and thence forcedinto the dre-box, furnishing a draft for the fire, which, in connectionwith the gases passing over the iire, assists in consuming the sparksand other products of combustion forced back in the fire-box from theinner cylinder or smoke-stack, B.

d d represent small tubes communicating with the chambers of fans C Gnear their upper ends, as shown in plain and dotted lines, Fig. l,through which air is forced by one of the fans D, for the purpose ofcleaning the fanchambers of smoke, soot, &c., and possibly to a slightextent retard the momentum of the spark-arresting fans C G.

When the outer cylinder or stack, A, is used,

`the space between it and the inner cylinder or stack,B,should be closednear the top,as shown in Fig. I, to prevent the upward passage andescape ofthe products of combustion through said space.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

l. The combination, with the cylinder or smoke-stack B, of thespark-arresting fans O C, arranged one above the other and projectinginto the stack, so as to slightly overlap each other, and operated bythe upward or rising products of combustion, heated air, and steamthrough said stack B, substantially as specified.

2. The combination, with the cylinder or IOO smoke-stack B, and fans CC, arranged therein, as shown; and operated by the upward or risingproducts of combustion, heated air, and steam through said stack, of thefans D D, connected to and operated by the fans C C, and the conduits FF, and tubes G G, substantially as and for the purpose herein shown anddescribed.

3. The combination, with the cylinder or smoke-stack B, of the fans C Cand their chambersprovided with the tube or tubes d, and the fan- D, al1arranged to operate sub- Stantially as herein shown and described.

4. The combination, with the cylinder or smoke-stack B, of the fans C Cand their t5 chambers provided with the tubes d d, the conduits F F,fans D D, and tubes G G, all arranged to operate substantially in themanner as and for the purpose herein shown and described.

In testimony that I claim theforegoing I have hereunto set my hand this3d day of January, 1884.

GEORGE SALTSMAN.

Witnesses:

THos. SLADE, E. M. HAMILTON.

